For citations:

Sitkin S.I. Report on the work of the XXI Congress of the Scientific Society of Gastroenterologists of Russia (GSSR) St. Petersburg, May 15-17, 2019. Experimental and Clinical Gastroenterology. 2019;(6):126-127. (In Russ.) https://doi.org/10.31146/1682-8658-ecg-166-6-126-127